ROY Keane has vowed to prove the critics wrong by staying at the pinnacle of football for a further three seasons.

The United captain, 32 in August, suffered one of his worst seasons last year as injury and then poor form saw him written off by the acrid tongues of certain pundits as a ‘has been’. But Keane is determined to prove that last season’s problems were no more than a temporary blip in a glittering career. Lucky 13 years “People are saying I’m not the player I was and I’m finished with football,” he said. “I’ve been a professional for 13 years and had a lot of pats on the back but this is the worst criticism I have had in my career. “You have to try not to get too carried away with the success and try not to get too down with all the negative stuff. “I have not played as well as I can but I am not playing as badly as some are suggesting. I am more than confident I will be as good as ever and playing at the top level for another three years. “Please God, I have three years left at Manchester United but if not I still think I will be playing at the top level somewhere.” And speaking to the Manchester United magazine, Keane added that he is doing everything within his power to extend his playing career. Keep on running “I am doing everything to make sure I can carry on as long as I can at United,” he said. “Not a day goes by when I am not looking to do something that could prolong my career. “I am looking at everything, whether it is stretching, footwear, diets, weights, making sure I get enough rest. “When you hit 30 that’s when you start thinking, `I want to hang in there, as long as I can’. “I don’t want to be hanging in there and just getting by. I want to still be at the top. That’s why I am constantly looking around, like you do in life, as to what will make me better and help me.” Do you think Roy's got three years left at the top? Have your say.